1. Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
2. Digestive Diseases Research Center, University of Ulsan College of Medicine, Seoul, Korea
3. Inflammatory Bowel Disease Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
4. Department of Internal Medicine and Institute of Gastroenterology, Yonsei University College of Medicine, Seoul, Korea
5. Digestive Endoscopic Center, Seoul Song Do Colorectal Hospital, Seoul, Korea
6. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Ansan, Korea
7. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea
8. Department of Internal Medicine, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea
9. Department of Internal Medicine, Inje University Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
10. Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
11. Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
12. Department of Internal Medicine, Pusan National University School of Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
13. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
14. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
15. Division of Gastroenterology, Department of Internal Medicine and Gastrointestinal Cancer Center, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
16. Division of Gastroenterology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
17. Division of Gastroenterology, Department of Internal Medicine, Konyang University College of Medicine, Daejeon, Korea
18. Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
19. Division of Gastroenterology, Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul, Korea
20. Department of Internal Medicine, Digestive Disease Research Institute, Wonkwang University College of Medicine, Iksan, Korea
21. Department of Internal Medicine, Chung-Ang University College of Medicine, Seoul, Korea
22. Department of Internal Medicine, Jeju National University College of Medicine, Jeju, Korea
23. Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
24. Department of Internal Medicine, Seoul National University Boramae Medical Center, Seoul National University of College of Medicine, Seoul, Korea
25. Department of Gastroenterology, Ajou University School of Medicine, Suwon, Korea
26. Division of Gastroenterology, Department of Internal Medicine, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea
27. Department of Internal Medicine, College of Medicine, Kyung Hee University, Seoul, Korea
28. Department of Internal Medicine, Chosun University College of Medicine, Gwangju, Korea
29. Department of Internal Medicine, Daejeon Eulji Medical Center, Eulji University College of Medicine, Daejeon, Korea
30. Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
31. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
32. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
33. Division of Gastroenterology, Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea